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Heavy Haul Trailer

One of my customers called this mourning,their heavy haul truck took out part of a rail road crossing! Truck loaded with a cat345 trackhoe,boom laid down in between the main center beams of the trailer,well when he caught the track doing 30 mph it stopped the truck almost in its tracks.Well the backhoe slid forward on the trailer ended up on top of 5th wheel,never slid off,but the boom took out 5 crossmembers between the main beams.Need to replace the bent crossmembers,This is probably t-100 steel the main beams
I'm thinking cut out old ones ,preheat main beams and weld back new rectangle tubing 6x12x 1/4 wall back in with 7018. Anybody out there have any experience with these heavy haul trailers?

One of my customers called this mourning,their heavy haul truck took out part of a rail road crossing! Truck loaded with a cat345 trackhoe,boom laid down in between the main center beams of the trailer,well when he caught the track doing 30 mph it stopped the truck almost in its tracks.Well the backhoe slid forward on the trailer ended up on top of 5th wheel,never slid off,but the boom took out 5 crossmembers between the main beams.Need to replace the bent crossmembers,This is probably t-100 steel the main beams
I'm thinking cut out old ones ,preheat main beams and weld back new rectangle tubing 6x12x 1/4 wall back in with 7018. Anybody out there have any experience with these heavy haul trailers?

Actually i missed all the fun,they had the trailer at their shop this mourning. One of the mechanics said everybody (law&railroad people)was on the scene .Good part no other vehicles were involved, the driver was shook up a bit from the sudden stop ,couple cuts on the head from the steering wheel and fortunately it was around 7:00 a.m. in the mourning hardly no traffic on sunday mourning.

I meant some type of high tensile steel ,sorry about that. Ilooked on the loadking trailer website states 100,000/80,000 ksi steel

Most likely T-1.

I worked on some heavy haul lowboys that were made with T-1. These trailers were grossly over loaded, and abused! Cracked welds from one end to the other. We arced the bad welds out, and re-welded with 110-18. Everything went according to plan, until the post weld cool down!

Caution!
These are "my" views based only on “my” experiences in “my” little bitty world.